Plastic window ventilator



Oct. 11, 1949. M WOLTERS 2,484,769

' PLASTIC wINDow VENTILATOR A Filed July 25, 1945 Patented Oct. 11, 1949 UNITED STATES PATENT OFFICE 2,484,769 P'ILASTIC WINDOW VENTILATOR Maude Wolters, Kenmore, N. Y.

Application July 25, 1945, Serial No. 606,911

9 Claims.

ranged so that a plurality of sections may be de.

tachably secured together to provide a composite ventilator to fit a window opening of desired size.

The invention provides av ventilator that is readily cleaned, is non-corrosive and is arranged in sectional form so that two or more sections may be detachably secured together in providing a composite structure forming a complete ventilator that by the assembly of two or more sections can be arranged to iit most any width of window opening.

The invention comprehends the provision of a ventilator particularly adapted for construction of plastic material of a transparent or semitransparent character and formed of a plurality of ventilator sections in which each section is arranged to provide a row or plurality of rows of ventilator openings or ducts extending transversely through the ventilator for controlling the passage of air therethrough. The ventilator sections are each formed of strip portions extending in lateral relation to each other and across the section between opposite faces with intermediate portions of each strip of greater cross-sectional dimension than the outer edges to provide walls dening the ducts that taper inwardly toward each other to form a Venturi. 'I'hese ducts are arranged in rows and operate so that they cause mixing of the air owing therethrough at the discharge side thereof, and by so doing, reduce the tendency to the creation of drafts. This duct arrangement also facilitates the use of plastics in a manner that will avert warping and sagging of the strips. A screen may be cast in the ventilator units when desired, to keep insects from passing through the ducts. In addition, the screen has the advantage of cooperating with the plastic in a manner that will provide for the production of longer sections than would be otherf wise practical as the screening supports the louvers against warping and sagging.`

In the drawing:

Fig. 1 shows a ventilator constructed according to the invention, in perspective.

Fig. 2 is a vertical transverse cross-section through the ventilator in one of the ventilator sections showing it applied in position in a conventional window structure.

Fig. 3 is a horizontal cross-section, rotated 90, through one end of the ventilator on an enlarged scale showing one end section, a pair of ventilator sections and a connecting member for the ventilator sectionsv to illustrate how the several sections are assembled in forming a ventilator.

Fig. 4 is a horizontal cross-section, rotated 90, through one end of a ventilator section illustrating how a ventilator section may be formed with two or more rows of ducts in the vertical direction as well as the horizontal direction.

A ventilator constructed according to the present invention is made up -of a. series of assembled sections. These sections generally include one or more ventilator sections, indicatedl at I, secured together by connector sections 2 and preferably having end sections 3 for forming a complete ventilator.

The ventilator section I, as shown -in Figs. 1, 2 and 3, is formed with a pair oi' spaced parallel upright strips 4 molded in integral relation with a. plurality of horizontally or laterally extending connecting strips 5 arranged in spaced parallel relation. Strips 5 are inclined in transversely extending relation to strips 4 from one face of the section to the other in the manner shown in Fig. 2 in order to provide ducts indicated at 6 that are inclined with reference to the faces of the ventilator. The inclination of ducts 6 is such that when the ventilator is placed in a window as shown in Fig. 2, the ducts incline inwardly and upwardly in such a manner that the inner upper edge of each lateral strip 5 is above the horizontal plane of the lower edge of the lateral strip 5 next above. In this way, the strips are arranged so that rain will not enter through the ducts between the strips due to their upwardly inclined relation fromthe outer face of the ventilator to the inner face thereof. in the drawings, are molded in integral relation from suitable plastic material.

f Attention is directed to the fact that the strips 4 and 5, as shown in Figs. 2 and 3, have a greater cross-sectional dimension in the intermediate portion thereof at 1 than at the outer edges indicated at 8. This provides a two-fold advantage. First, it facilitates the construction of the mold for the manufacture of the ventilator sections from molded plastic material in a convenient manner; and second, the ducts 6 have a smaller transverse dimension in the intermediate Strips l and 5, as shown portion of the ventilator section than at the outer edge vor face thereof. This provides a Venturi passage or duet construction for each of the ducts 6. This Venturi duct formation secures a mixing of the air as it leaves the inner face of the ventilator from each of the ducts causing the air at the inner side of the ventilator coming through the ducts to be thoroughly intermixed thereby providing a construction that reduces draft' conditions adjacent the window and the ventilator. l

If desired, each ventilator section may be constructed with more than two upright strips 4 and A more than two rows of ducts B in the vertical direction in a manner that can be well understood by one skilled in the art, upon referring to Fig.

4. Fig. 4 shows a fragmentary view of a ventilator section having more than two upright strips and rows of ducts 6. The strips 4 will be arranged at the end of the ventilator section in the usual manner. Intermediate the ends of the ventilator section there will be one or more upright strips 9 arranged in spaced parallel relation to upright strips 4 and of duplicate construction thereto. The only difference is that with an upright strip 9, as shown in Fig. 4, there will be two sets of laterally extending strips 5, one at each side of the strip 9. This will illustrate how the ventilator sections can be constructed with a plurality of rows of ducts extending in two directions. In the construction shown, the ducts extend in rows in vertical and horizontal relation.

In constructing a complete ventilator, two or more ventilator sections are assembled in end-toend relation, as shown in Fig. 1, through the use of the connecting members 2. members or sections 2 each comprise an elongated strip IIl of a greater width than upright strips 4. Oppositely extending lateral anges II of the sections.

A plurality of ventilator sections may be assembled together, as shown in Fig. l, by means of a plurality of connector sections 2 and the end sections 3 applied thereto to form a ventilator of uniform height having the overall width between the end walls I3 of end sections 3 arranged to t a window opening .of a given width. The ventilator is inserted in the window opening by raising the sliding sash and inserting one end section 3 into the groove at one side of the window and thenmoving the opposite end into the groove at the other side. By shifting the ventilator it may be moved into centered position in the window opening, against the window The connecting are formed` along the edges of each strip I0, and

have inwardly extending edge portions I2 iorm-v ing channels at both sides of each strip I0 to slidably receive van upright strip 4 on each side of each strip I0. In this way, two ventilator sections are rigidly assembled together with the connector section in. the formation of a ventilator. A desired number of ventilator sections may thus be connected in end-to-end relation to provide the desired width of ventilator in a horizontal direction to ilt in a given sizeof opening. If desired, the ventilator may be made solely from the ventilator and connector sections.

It is preferred however, to provide the ventilator with end sections 3 in the form of plastic tubular sections having an outer end wall I 3, side walls I4 extending laterally therefrom and formed at the free edges with inturned flanges I5 arranged in pairs to form inwardly facing 'channels slidably receiving the upright strips 4 at the end of an assembled group of ventilator sections. 'I'he ventilator sections, connector sections 2 and end sections 3 are all formed of substantially equal length from the top to the bottom portions thereof, as shown in Fig. 1, so that the ventilator when assembled, will be of uniform height throughout the width thereof between the end sections 3. As shown, the ventilator has two end sections.

At the upper and lower ends of each ventilator section, the upper and lower transverse strips 5 are formed at the edge nearest the end of the section with a curved portion formed integral with a transversely extending end strip I6 to provide a flat face along the upper and lower -guides at opposite sides.

The lower portion is seated on the window sill and the sliding sash is moved down so that the lower edge engages the upper portion of the assembled ventilator when the parts will occupy positions substantially as,

shown in cross-section in Fig. 2.

By constructing the ventilator of transparent plastic material it will be understood that in addition to providing for the passageV of air through ducts Gafrom the outside to the inside through the window, the transparent character -of the ventilator also admits light and at the same time, obstructs the view through the ventilator to the inside of the room. In addition, the inclined relation of transverse strips 5 keeps out rain and allows air to pass through ducts 6 to the inside of the Ventilator where the air is vides for retaining the'strips in position after molding against warping and provides a structure ventilator sections can be varied to a substantial extent in a horizontal. as well as a vertical direction. Ventilator sections of different lengths in a. horizontal direction may be made for assembly with one another so that two or more ventilator sections may be assembled into a unit to form a'ventilator for tting into a window opening of predetermined width. y

It is to be understood that ii it is desired, the use of the end sections can be eliminated although they are desirable in building up the width of ventilator necessary to llt Windows of many different sizes. By the use of ventilator sections, as well as end sections, of varying horizontal dimensions, a ventilator can be constructed from two or more of these sections to fit practically every size of window nowl in existence.

While reference has been made to the use of plastic material in the construction of the ventilator herein described, it will be understood that these plastic materials may include thermoplastic compositions as well as thermosetting compositions and also several new -types of glass compositionsof the type used for making glass i brick and the like. It is therefore to be under- It will also be understood that more than two upright strips'l may be employed in the construction of a ventilator section using two or more vertical rows of laterally extending strips 5, in the manner shown in Fig. 4 and described above, to the extent that the entire ventilator section structure shown in Fig. 1 may be molded in one piece without using connector sections 2. Ventilator sections of this character may be made and employed with end sections 3 in building ventilators according to this invention to nt windows of different widths.

By providing ventilator, connector and end sections of different widths, users of ventilators constructed according to the invention may secure the desired number of ventilator sections, connector sections and end sections and slidably interengage them together into interlocked relation to form a ventilator having a width suilicient to nt a desired size of window. In this way, a ventilator constructed of two or more sections of the character hereinabove described, can be made by any one through the purchase of the desired number of sections from a store or the like equipped with the separate sections. They are assembled in the manner shown in Fig. 1 to provide a composite assembled ventilator of the desired width to iit the size of open-- ing in which the ventilator is to be placed.

The invention further provides for the use of screening built in the ventilator sections to exclude bugs, etc. from passing through the ducts. The screening is molded. inthe intermediate or central portion of the ventilator sections as shown in Figs. 2 and 3 and indicated at I1. By placing the screening I1 between the mold sections, the plastic material runs through and about the screening which becomes fully embedded ln the sections. In this way, ventilator sections of greater length maybe made with the use of fewer upright strips l andY 9 because the screen provides a support for strips 5 so they will not warp and bend.

The invention claimed is:

1. A ventilator comprising a plurality of ventilator sections, each formed of molded integral plastic to provide spaced parallel upright strips yand lateral louvers extending therebetween, said strips and louvers cooperating to form a plurality of polygonal ducts extending diagonally between opposite faces of each section, attaching strips formed of moldedplastic having retaining ilanges on opposite edges, each strip slidably receiving the upright strip at the end of two ventilator sections on opposite sides for interlocking two ventilator sections thereto in end-to-end relation, and end sections of plastic material each formed to slidably engage on the upright strip at the end of a plurality of assembled ventilator sections for cooperation to form a composite ventilator for fitting a window opening of predetermined width.

2. A ventilator comprising a plurality of ventilator sections each formed of molded integral plastic to provide spaced parallel transversely extending upright strips and spaced parallel strips forming louvers joining adjacent strips in laterally extending relation therebetween. said strips forming a plurality of ducts extending between opposite faces of said sections, attaching strips formed of plastic material having return bent flanges on each side of each edge thereof to provide a pair of channels slidablv receiving an upright strip on one of said ventilator sections on each side thereof for securing a pair of said ventilator sections together in end-to-end relation, andan end section of molded plastic having an end wall and laterally extending front and Iback wall portions formed with inwardly extending channels at-the free edges detachably embracing the free edges of the upright strips on an end ventilator section for cooperation to form a composite ventilator to t a predetery mined size of window opening.

3. A molded ventilator section comprising a plurality of spaced parallel longitudinally and laterally extending intersecting strips formed in integral relation, each of said strips extending transversely of said ventilator between opposite faces, and a screen embedded in said section intermediate opposite faces cooperating to support al1 of said strips rigidly in position against bending and warping and preventing insects from passing through the ducts formed by said strips.

4. A molded ventilator section comprising a plurality of spaced parallel upright strips extending in transverse relation between opposite faces of said section, a plurality of spaced parallel louver strips extending in inclined relation between opposite faces of said ventilator section and joining said upright strips in laterally extending relation thereto, and a screen embedded in the intermediate portion of said ventilator section substantially parallel to the opposite faces thereof and attaching all of said strips together throughout the length thereof in rigid relation.

5. A ventilator comprising a pair of ventilator sections, each section having upright strips at opposite ends thereof and louver'strips extending between said upright strips, and a connector section having an elongated strip, laterally extending flanges on each edge of said elongated strip projecting from opposite sides and having inturned lips at their respective free edges cooperating to form channels on both sides of said elongated strip, each connector sectionl slidably receiving an upright strip at one end of one ventilator section in the channel on one side thereof and the upright strip of another ventilator sec- Vtion in the channel on the opposite side thereof,

said inturned lips embracing the edges of said upright strips for detachably interlocking a pair of ventilator sections to said connector section in end-to-end relation on opposite sides of said connector section.

6. A ventilator comprising a pair of ventilator sections, each having upright strips at opposite ends in transversely extending relation, and a connector section between and joining said ventilator sections in end-to-end relation, said connector section being formed with flanges on opposite edges of an elongated strip to provide channels on opposite sides to receive one of said upright strips on each ventilator section in one of said channels on opposite sides of said elongated strip and inturned lips formed on the edges of said anges extending toward each other on said connector sections for engaging and retaining said upright strips in said channels against detachment except by endwise sliding movement.

'7. A ventilator comprising a pair of ventilator sections, each having upright strips at opposite ends in transversely extending relation, and a connector section for connecting said ventilator sections together in end-to-endV relation, said connector section having a body portion extending between said upright strips and having inturned lips extending around and embracing opposite edges of the adjacent upright strips of said pair of ventilator sections for interlocking said aesqzea having upright strips at opposite ends, and an 5 end section of substantially tubular form having an end wall, side walls extending laterally therefrom. and opposed channel portions formed at the free edges of said side walls slidabl-y receiving opposite edges of one of said upright strips in. said opposed channels to detachably secure said ventilator and end section together.

9. A ventilator comprising a ventilator section having upright strips at opposite ends, and an l5 end section oi' U-shape in cross section formed with inturned iianges the free edges of the U- shaped portion extending toward each other and slidably receiving an' y ht strip of said ventilator section thereinjfuar securing said end and ventilator sections tdther in adjacent relation. v AUDE WOLTERS.

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